Latency that holds under real load
Sub-300ms end-to-end, even when concurrency spikes - so a traffic surge doesn't turn into a dropped call.
Voice Agent API
Build the voice agent your callers never hang up on
One API for real-time transcription, sub-300ms latency, and 100+ languages - so your team ships conversations, not speech infrastructure.
Trusted by
103ms
Partial transcripts
Fastest on the market powering natural, real-time voice agents.
#1
On conversational audio
Leader on Switchboard for real calls, not just clean audio.
100+
Languages with code-switching
Detects and transcribes mid-sentence language switches, automatically.
Why teams switch to Gladia
Everything your voice agent needs. One request.
Enterprise-ready from day one
Zero data retention by default, with EU and US data residency.
Precision on the details that break workflows
Accurate on phone numbers, emails, and names - for fewer fallbacks and cleaner downstream inputs.
Multilingual without re-architecting
Native code-switching across 100+ languages, tuned for the markets where it matters most.
Stream-first architecture, easy integration
Built for LiveKit, Pipecat, VAPI, and Twilio - the frameworks your team is already building on.
Priced to scale with your usage
Usage-based pricing from your first call to your millionth, with enterprise terms available as you grow.
Built for the chaos of real conversation
Gladia's Solaria models outperform every provider on Switchboard, the toughest conversational benchmark. Our benchmark methodology is open-source, so you can reproduce the results.
Compare models Compare modelsSolaria-3
Solaria-1
AssemblyAI
Speechmatics
Mistral
Deepgram
ElevenLabs
What you can build
From first agent to enterprise voice infrastructure
For builders
Ship a vertical-tuned agent - collections, scheduling, support - without owning the STT layer or the infrastructure behind it.
For platforms
White-label infrastructure, per-client usage reporting, and a compliance stack that scales as your enterprise clients do.
For voice features
Add a voice capability to an existing product with a vendor your engineering and security teams can actually approve.
Something else entirely
If your product holds a live conversation over the phone, Gladia handles the layer underneath. Explore the API and build what you have in mind.
View our docs
Getting started
From API key to your first transcript in minutes
01
Get your API key
50€ in free credits with diarization, summaries, sentiment, and 100+ languages included.
02
Connect your audio stream
Stream via WebSocket from your telephony or voice orchestration layer - LiveKit, Pipecat, Jambonz, VAPI, or a custom SIP setup.
03
Receive live partials and finals
Word-by-word partials in <103ms, finals close behind - ready for your LLM to act on mid-utterance.
04
Get dedicated support
Volume discounts and enterprise SLAs as you scale, with dedicated support - not a ticket queue.
What builders say
Trusted in production by teams building meeting AI
We initially attempted to host Whisper AI, which required significant effort to scale. Switching to Gladia brought a welcome change.
Gladia's real-time code-switching has been a real 'wow' factor! Plus, the accuracy of transcription has been excellent.
Gladia's real-time code-switching has been a real 'wow' factor! Plus, the accuracy of transcription has been excellent.
Everything we do based on transcription became better after we switched to Gladia. The accuracy across European languages has been transformative.
Your voice agent, built on a speech-to-text layer that doesn’t break under load
Join 350,000+ users building real-time voice applications on Gladia.
FAQs
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Yes - Gladia is a supported provider across all four, with WebSocket streaming and SDKs for Python and TypeScript. Most teams are live within a day of getting their API key.
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Gladia is built for sub-300ms end-to-end latency with <103ms first-partials, and infrastructure that scales with concurrent sessions. If you're expecting sustained high-volume traffic or have specific concurrency requirements, our team can walk through your setup before you go live.
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Yes - Gladia is SOC 2 Type II, ISO 27001 and ISO 27701, and HIPAA compliant, with BAAs available and zero data retention as an enterprise option. Data is never used for model training by default.
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Fast technical response during trial and early production, with a named account contact, defined SLA response times, and an escalation path to engineering once you're in production.
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100+ languages with native code-switching - including mid-sentence switches. You can find a full list of supported languages here.